By that calculus, her choice is easy. Time to set her sights on the larger stage. But there’s one problem. To be a plausible presidential candidate, you need a convincing personal narrative. Palin used to have a great one: small town mayor of Wasilla battles the big meanies and saves her beloved state. With today’s announcement, the story has taken a turn. Now it’s: small town mayor of Wasilla gets tired of all the losers in Wasilla and dumps them so she can live her life on "another scale." Not quite as endearing.